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OpenStack: Live migration fails when using NVMe

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Applies to

  • OpenStack

Issue

When performing a live migration (cinder migrate) between two hosts, the migration fails when the following is encountered:

  • The source host NQN is present in the subsystem
  • The destination host NQN is not present in the subsystem
  • Cinder volume is attached to an instance (in-use)
  • netapp_use_legacy_client = False is enabled in the backend

The live migration fails during the “pre-live migration” step when attempting to map the cinder volume to the subsystem.  

The following error is seen in the Cinder API log during the migration attempt:

2024-08-12 19:46:19.365 21 ERROR cinder.api.v3.attachments cinder.exception.VolumeBackendAPIException: Bad or unexpected response from the storage volume backend API: Driver initialize connection failed (error: NetApp API failed. Reason - 72089790:Namespace is already mapped to subsystem "openstack-24ef4209-c13a-477f-a747-7e62bb121b54".).

 

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